Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7c03b976b65b30…

MALICIOUS

PDF

68.9 KB Created: 2021-03-25 16:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f74494af7431c443d2a1c72f242acd32 SHA-1: 3ab7580100a1742f9df99f03986585f066c6c4e8 SHA-256: cb7c03b976b65b306fbc3e1b319d6add29dea2b443026fd69c0e11c7741134c8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm designed to redirect users to various external PDFs, likely as part of a phishing or SEO manipulation scheme. The primary URL, 'https://ponafet.ru/strik?utm_term=how+to+child+lock+panasonic+microwave', suggests a lure related to a common search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/strik?utm_term=how+to+child+lock+panasonic+microwave PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469863/normal_60198eec2e040.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417033/normal_5fef988105a17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_60155a4b7fc2a.pdfIn PDF document text
    • http://busijizi.medianewsonline.com/96943941238.pdfIn PDF document text
    • http://goodxday.xyz/92068916523o77ff.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/electrical_estimation_and_costing_book.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/microsoft_office_for_mac_2011_catalinapw8yy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486350/normal_5ffb4a27beb0d.pdfIn PDF document text
    • http://umkatrade.ru/the_chocolate_touch_free385v2.pdfIn PDF document text
    • http://topstudy.fun/rodotuzezek9bpr.pdfIn PDF document text
    • http://libertinemodels.com/how_do_i_unlock_my_nortel_mailbox4iirc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_60318063b7dd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_c318d4c8306a4f82a3ee35124447639c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c35bb3a-cd12-4a25-b8b6-99b4270d14ed/22259518196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43fa766-7bb6-4919-b6ad-523cd858624a/83269825554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706ee27b-7d50-4f9c-8a61-2a0765c88c40/wovifurozeriwusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a0f5ef-2508-4b09-8535-d95545f5e4a8/onkyo_tx-8160_manual.pdfIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_fe439254563346e69a3bcc54e312697c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/add7e741-f8d3-40fc-9250-00ebf2968a53/nazegezed.pdfIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_a0a903bc746c4642932a147160960ff7.pdf?index=trueIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_64e7a7af2a8845abbc6ae8ea0ea15e46.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/53379d61-35df-4c1e-b608-bc4e08f1f44a/powinupizoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/057a543a-a16e-4562-b717-77a85d3d7fdb/45819614946.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/what_hot_sauce_has_the_highest_scoville_units.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3d6e4e-0eca-4f5a-b9d0-075538ec4e4d/what_is_computer_class_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43fdf6e6-dce6-4e92-8935-996dce1ea190/marco_gas_fireplace_fan.pdfIn PDF document text
    • https://9e1bd277-069e-4713-bdcc-1ab96cf790c3.filesusr.com/ugd/5fd2af_87d3579991ef46e09d3f490dab074509.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00A 5492 bytes
SHA-256: b63c9cbb4d745cbf0ed580244c2cb5024a36b66f6499f376a47098c5b51bf2a5
font_01_sfnt_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 10248 bytes
SHA-256: b28b242f919b2a46169394ac5c2562d68c4fd49012430012e24246743c0fa175